Electric-arc lamp.



' YPATENT'BD APR. 28, 1908.-

H. BECK. ELECTRIC ARC LAMP.

APPLIOATION FILED NOV. 16.1908.

@u/ r, Inventor:

Attest:

- Y MAtty.

HEINRICH BECK, OF FRANKFORT-ON-THE-MAIN, GERMANY, ASSIGNOR TO BECKFLAMING LAMP COMPANY, OF CANTON, NEW

YORK, A CORPORATION OF NEW YORK.

ELECTRIC-ARC LAMP.

To all whom it may concern:

Be it known that I, HEINRICH BECK, a subject of the German Emperor,residing at Frankfort-on-the-\lain, Germany, have in vented certain newand useful Improvements in Electric-Arc Lamps, of which the follow ingis a specification.

My invention relates to electric arc lamps and more particularly tolamps of the kind described in Letters Patent of the United States No.795681, issued to me July 25th, 1905, and. has for its object thesealing of the feeding aperture for the free electrode and its noveltyconsists in the construction and adaptation of the parts employed toeffectu-- ate this purpose.

The lamp described in that patent comprised a framework forming theupper part of the globe and through which framework the electrodes wereadapted to be fed by gravity, either when. arranged in parallel verticalplanes, or when inclined to each other. Means were provided to feed theelectrodes downward evenly. One electrode was supported upon a permanentsupport, and as it burned away at its lower extremity graduallydescended by its weight, and the other elec. trode was free from anypermanent sup port but was swung or supported from the other electrode.Each electrode was guided against lateral displacement by suitablemechanism and each lamp passed through apertures in the framework. Theaperture for the passage of the free or second electrode was necessarilygreater in diameter or at least longer in one direction than theaperture for the passage of the-supported elec trode, because in thelatter instance there was no lateral movement to such electrode and theburning pencil could be adapted snugly to fit the aperture.

In the practical operation of this lamp it has been found that when thea erture in the framework through which the tree electrode is adaited topass is not well sealed, the products oi combustion arising from theburning electrodes and the dust will passv upward through this apertureand will injuriously affect the mechanism above the same. If a singleseal plate is employed as has been attempted, and this plate is largeenough in its lateral movement to seal the aperture necessary toaccommodate the electrode, it is apt Specification of Letters Patent.

Application filed November 16, 1906.

Patented April as, 1908.

Serial No. 343,739.

gressively diminishing openings, so that each plate is adapted to seal aportion of the aperture in the surface beneath it, and the lowermostplate is adapted to seal the outer portion of the aperture in theframework and at the same time is not wide enough when the electrode isnearest to the supported electrode to contact with the supportedelectrode.

In the drawings, Figure 1 is a vertical section through the frame of thelamp and the sliding sealing plates, showing the free electrode in aposition close to the supported. electrode and Fig. 2 is a similar Viewshowing the same electrode in a position away from the supportedelectrode. In the drawings 1 is the supported electrode; 2 is the freeelectrode supported from or carried by the supported electrode bysuitable mechanism (not shown); 3 is the support for the electrode 1 4is the framework of the upper part of the lamp provided with a smallaperture 5 to admit of the passage of the supported electrode 1, and alarger and wider aperture 6 to admit of the passage of the freeelectrode 2; 7 is a stop lug secured to or made integral with the frame4 and adapted to limit the lateral slide of the sealing plates.

The sealing )lates consist of a series of su perimposed p ates of whichtwo only are shown in the drawingsv 10 is the lower plate having anaperture 11 much wider than the electrode 2 adapted to pass therethroughand 20 is the upper plate havingan aperture 21 which just permits theelectrode 2 to pass therethrough and is consequently smaller than theaperture 11. 4

When the parts are in the position shown in Fig. 1 it will be noted thatthe plate 10 seals the aperture 6 at the right and that its aperture 11is itself sealed by the plate 20 and that when the parts are in theposition frame and another shown in Fig. 2 the plate 10 seals theaperture 6 at the left and that its aperture 11 is sealed by the plate20, while at the same time the stop lug 7 limits its movement in thisdirection.

It is obvious that the number of sliding plates may be increased andother modifications made in the construction of the parts withoutdeparting from the principles upon which the invention is based.

hat I claim as new is:

1. In an electric arc lam an electrode, a frame having an aperturetiirough which the electrode passes, said aperture of greater diameterthan the electrode so as to permit lateral movement of the latter, andmeans for sealing the aperture, comprising a lurality of superimposedplates supporter by the frame and apertured for the passage of theelectrode through them, one of said plates partially sealing theaperture in the artially sealing the aperture in the plate be ow it,each of said plates being free to slide by the lateral movement of theelectrode.

2. In an electric arc lamp, an electrode, a frame having an aperturethrough which the electrode passes, said aperture of greater diameterthan the electrode so as to permit lateral movement of the latter, andmeans for sealing the aperture, comprising a plurality of superimposedplates supported by the frame and formed with apertures of successivelyreduced diameter, one of said apertures being approximately of thediameter of the electrode and another of greater di-- ameter than thesame and of lesser diameter than the aperture in the frame, each of saidplates being free to slide by the lateral movement of the electrode.

3. In an electric arc lamp, an electrode, a frame having an aperturethrough which the electrode passes, said aperture of greater diameterthan the electrode so as to permit lateral movement of the latter, andmeans rality of superimposed plates supporte by l the frame and formedwith apertures of successively reduced diameter, one of said aperturesbeing approximately of the diameter of the electrode and another ofgreater diameter than the same and of lesser diameter than the aperturein the frame, each of said plates being free to slide by the lateralmovement of the electrode, and a stop projecting from the frame in thepath of movement of one of said plates.

4. In an electric arc lamp, a pair of electrodes having relative lateralmovement, an apertured frame through which both electrodes pass, andmeans adapted to seal one of the apertures in the frame, comprising afirst plate snugly fitting one of the electrodes, and a second plateintermediate the first plate and the aperture in the frame and looselyfitted to said electrode, said plates being free to slide by the lateralmovement of the electrode.

5. In an electric arc lamp, an apertured frame, an electrode adapted tobe fed through the same, and a plurality of sliding frames havingapertures of progressively decreasing diameters through which theelectrode also passes, said plates free to be moved by the electrode,and cooperating to seal the aperture in the frame.

6. In an electric arc lamp, an electrode, a frame having an aperture ofgreater diameter than the electrode, through which the electrode passes,a slidable plate embracing the electrode and moving with it and adaptedto close a portion of said aperture, and an intermediate slidable plateadapted to close the remaining portion of the aperture.

In testimony whereof I affix my signature in presence of two witnesses.

HEINRICH BECK.

Witnesses JEAN GRUND, CARL GRUND.

